Meaning of INVAGINATION
| Pronunciation: | | in`vaju'neyshun
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 WordNet Dictionary |
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- [n] the folding in of an outer layer so as to form a pocket in the surface
- [n] the condition of being folded inward or sheathed
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| | Synonyms: | | infolding, introversion, introversion, intussusception |
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| | See Also: | | biological process, condition, organic process | |
| Webster's 1913 Dictionary |
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| | Definition: | | \In*vag`i*na"tion\, n. [L. pref. in- + vagina
sheath.]
1. (Biol.) The condition of an invaginated organ or part.
2. (Biol.) One of the methods by which the various germinal
layers of the ovum are differentiated.
Note: In embolic invagination, one half of the blastosphere
is pushed in towards the other half, producing an
embryonic form known as a gastrula. -- In epibolic
invagination, a phenomenon in the development of some
invertebrate ova, the epiblast appears to grow over or
around the hypoblast.
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